Is it that day already? Saturday was "International Pillow Fight Day," which in New York City drew throngs of would-be warriors to Union Square. The New York event was the fifth held here.

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If you're going to go for it, go big -- Here a reveler dressed as Gumby goes to town.

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Call it a war cry -- A man wielding a very unmanly cat pillow lets 'er rip in Union Square.

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Life goes on in the sunny streets on Manhattan as the mostly young crowd has fun in the square.

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It wasn't just in New York -- Similar scenes played out all over the globe. Here a flash mob takes part in a ten minute pillow fight in the Champ de Mars near the Eiffel Tower in Paris.

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Here the feathers fly in Zamkowy Square in Warsaw, Poland.

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Lausanne city center in Switzerland.

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Buffalo, N.Y., does it in style, sort of -- a woman dressed as Oscar the Grouch takes a swing.

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Washington, D.C. joined in the fun.

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The statue of George Washington at Union Square rises in the background as the melee ensues in New York.

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Right in the kisser! A young girl gets clobbered at the "fight" in New York City.

EPA

Oh come now! Bringing armor to a pillowfight seems a little overboard, but at least one man decided to go gladiator-style.

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There was no immediate crowd estimate, but 17,000 pledged to show up on the group's Facebook page, where participants gushed afterwards as well. "So much fun," was a common refrain, and it looks accurate.